Hi all,
I'm getting introduced to SEMS (congrats to the developers, it's a very nice
piece of software) but before going deeper into the documentation I'd like
to know if it's possible to set up the scenario below for a click2dial
application with SEMS acting as B2BUA:
4.4. Flow IV
A Controller B
|(1) INVITE offer1 | |
|no media | |
|<---------------------| |
|(2) 200 answer1 | |
|no media | |
|--------------------->| |
|(3) ACK | |
|<---------------------| |
| |(4) INVITE no SDP |
| |--------------------->|
| |(5) 200 OK offer2 |
| |<---------------------|
|(6) INVITE offer2' | |
|<---------------------| |
|(7) 200 answer2' | |
|--------------------->| |
| |(8) ACK answer2 |
| |--------------------->|
|(9) ACK | |
|<---------------------| |
|(10) RTP | |
|.............................................|
Figure 4
It's the flow 4 from RFC3725 (http://www.ietf.org/rfc/rfc3725.txt), and it
is the recommended one when only both sides (A and B) are humans (I mean
"not media servers"). Is it possible to initiate a session without media and
then bridge the call to another one with SEMS? I've already tried with other
3pcc flows such as Flow II (in RFC3275 as well) which can be easily set up
with the OpenSIPS B2BUA modules, but that flow doesn't meet my costumer's
requirements.
Best regards.
Thanks in advance.
Antón Román
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